Rotary motor.



No. 885,732; I PATENTED APR. 28, 1908. P. J. DARLINGTON.

ROTARY MOTOR. O

APPLICATION FILED JAN. 20, 1908.

2 SHEETS-SHEET 1.

FIG.1 77

Q I WITNESSES. NYENTOR.

No. 885,782. v PATENTED APR. 28, 1908.

P. J. DARLINGTON.

ROTARY MOTOR.

APPLICATION FILED JAN. 20, 19708.

2 sums-sum 2.

FIG.6

IIIIA LEI w WITNESSES. 45 mvamgm.

piston which has the centralrotary PHILIP}. DARLINGIIION, or PITTSBURG, PENNSYLVANIA.

- ROTARY MOTOR.

Specification of Letters Patent.

' Patented April as, 1908.

Application filed January- 20, 1908. semi No. 411,632.

To all whom it ma/y concemb Be it known that I, PHILIP J DARLINGTON, a resident of Pittsburg, in the county of Allegheny and State of Pennsylvania, have.

invented'a new and useful Improvement in Rotary Motors; and I do. hereby declare the following to be a full, clear, and exact descri tion thereofv is invention relates to motors, and more particularly to motors arran ed to be passed through boiler tubes and the ike for the purpose of driving tools to remove 'the'scale therefrom, although it may be used for various other pur oses. The particular object of the invention is to rovide a motor which is capable of operation y compressedair, which 1s powerful, compact, simple and cheap of construction, and easvgl y repaired.

ith these and other objects in view the invention consists in the novel construction, arrangement and combination of parts as hereinafter described and claimed. In the accompanying drawings Figure 1 is a longitudinal section through a motor embodym my invention Fig. 2 is a similar section ta en at right angles to. the section of Fig-1; Fig. 3 is a view looking at the inner face of the rear head; Fig. 4 is a view looking at the rear end of the motor with the rear head removed; Fig. 5 is a view looking'a't the front end of the motor; Figs. 6, 7 and8 are transverse sections taken res I ectively on the lines 6 6, 77 and 88 0 Figs. 1 and 2;

Fig. 9 is a'section longitudinally of the motor through one of the oiling devices in the rear'head, and Fig. 10 is a detail view of the piston blade. v

In the drawing 1 designates the rotary cylindrical portion 2 provided with a (llametric slot 3 therethrough, which-slot extends lengthwise nearly to the ends of the cylindrical body portion of the iston. Said piston is provided with the ront journal portion 4 of reduced size and forming a shoulder 5 with the body portion and having an enlarged end portion 6 providing front and rear shoulders .7 and 8 and being rovided with flat faces 9 to receive a hol ing wrench, and having beyond said enlarged portion a reduced threaded ,iortion 10 for the attachment of a tool. 1e piston also has a reduced rear journal portion 11 forming a shoulder 12 with the cylindrical body portion and having an enlarged rear end 'c1rcular contour in cross section. 1s split or divided lon itudinally into two portions 15 and 15", w ich are provided on portion 13 formin a shoulder 14 with the ournal portion. .n the diametric slot of the piston is seated a flat piston blade 15 of a width exceeding the diameter of the piston and having its longitudinal edges of semi- This blade their meeting edgeswith projections 16 and 16 fitting looselytogether. This construction permits the two sections of the blade to separate and move outwardly slightly to compensate for wear on their edges and maintain contact with the wall of the cylinder, while by having the inter-fitting rojections on their meeting ed es the b ade 'sections are more deeply seate and securely supported in the slot of the piston than would be the case if their meeting edges were straight.

17 is a cylinder provided eccentrically therein with-the bore or chamber 18 and having the-piston located eccentrically in said chamber but concentric in the cylinder regarding its exterior, and contacting with the wall of the cylinder along a line. The chamber is of cylindrical form and bounds the space swept by the blade 15 while revolving around its. own central longitudinal-axis,

while that axis revolves around another axis parallel thereto and at double the angular velocity, this parallel. axis bein so located that both edges of the blade will (cop in con- "tact continuously with the cylinder wall during the rotation of the piston.

Both ends of the cylinder are counterbored concentric with the interior of the cylinder to provide internal shoulders 19 and 20, respectively. Fitted in the counter-bore in the front end of the cylinder and abutting against the internal shoulder 19 is a split bushing 21 provided with an eccentric bore to receive the frontjournal portion of the piston 1 and being counter-bored at its inner end to receive the end of the cylindrical body portion of said piston, the latter extending into said counter-bore up to the front end of the slot 3.

Similarly seated in the counter-bore in the rear end of the cylinder is a bushing 22 abut ting against the internal shoulder 20 and likewise having an eccentric bore adapted to re ceive the rear journal portion of the piston, said split bushing being counter-bored eccentrically atits forwardend to receive the rear end of the body portion of the piston up to the slot3 therein, andv forming a thrust bear- 31 wit At the rear end of the cylinder is a head 24 which is secured in place by means of a pair of long screws 25 extending through holes 26 in'the cylinder and provided at their forward ends with shouldered heads 27 and being threaded into the rear head 24. This rear head is provided with a central threaded opening 30 for the attachment of a hose, said opening communicatin through a passage a longitudina admission port 32 formed in the cylinder and communicating with a cross admission port 33 which opens into the cylinder chamber orbore.

34 is a longitudinal exhaust port opening through the front end of the cylinder and communicating with an exhaust cross port' 35 which opens into the inside of the cylinder at a point on the opposite side of the line of contact of the piston with the wall of the cylinder from the admission cross port 33.

The rear bushing 22 is formed with an air balance passage 36 running from its front face to its rear counter-bore and forming a communication from the space at the end of the piston to the inside'of the cylinder chamber at a point axiallyin line with the exhaust cross port 35. The head 24 is provided with a groove 37 leading from its exterior toward its center and at its inner end communicating with the counter-bore in the rear end of bush in 22, said groove 37 forming a relief vent to re ieve air pressure behind the piston in the chamber formed by said counter-bore.

The front bushing is provided with a transverse oil passage 40 for lubricating the front journal of the piston. This oil passage at the outer face of the bushing communicates with an oil passage 41. in the cylinder wall, the latter communicating with an annular groove 43 in bolt 25. The bolt is also provided with a longitudinal passage or groove 44 communicating with an annular groove 45 near the rear end of said bolt. The rear bushing is provided with the cross oil port 46 communicating with its bore and with a longitudinal oil ort 47 opening through the rear face of sai bushing.

The head 24 is furnished with three sets of oil supply pockets or-reservoirs, one set for supplying oil to the passage 47 in the bushing 22, another for su plying oil to the longitudinal groove of be t 25,- and another for supplying oil to the longitudinal admission port 32 of the cylinder. As these are substantiall similar,-a description of one will suf- 5 fice or all. Fig. 3 shows the arrangement ofthese variousgroups of oiling devices, while Fig. 9 shows the detail of construction of one thereof, and is as follows: A bore 50 is formed in the head 24 from its front face and ends in a conical shoulder 51 and is continued as a smaller hole 52 leading out through the rear face of the head. A ball valve 53 of a diameter less than bore 50 and larger than the hole 52 is normally held a ainst said conical shoulder by means of the spiral spring 54 which at its forward end bears against a cap or cup 55whieh.is tightly driven into the bore 50 and prevents the s rin and ball from falling out when the hea 24 1s removed from the cylinder. This ball normally closes the hole 52. 56 is another bore closed at its rear end by lug 57 and forming a passage between the here 50 and a bore 58 extending from the front face of the head and being closed at the rear. In the bore 58 is a bobbin formed by the stem 59 and, perforated disks or flanges 60 thereon. Said stem projects beyond the disks as shown so as to space the same from the end walls of the bore. Surrounding said stem between said disks or flanges is a coil 61 of lam wick or other absorbent material, loosely ling the space between the disks and acting as an absorbent of the oil and preventing the same from suddenly flowin into the machine but causing the same to ow slowly and gradually thereinto. The forward end of chamber 58 communicates through a groove 62 with the lonitudinal oil port 47 in the bushin 22. imilarly the group of oiling devices designated 65 communicates through a groove 66 with the annular groove 45 of bolt 25, while the group of oiling devices designated 67 communicates through a groove 70 with the lon itudinal admission port 32.

he cylinder 17 externally has the central cylindrical portion concentric with the isten and is provided with front and rear anges 72 and 73 respectively. A front dowel pin 74 and a rear dowel pin 75 are each set half in the cylinder and half in the front and rear bushings 21 and 22 respectively and serve to hold said bushings against rotation. A front removable shoe rin 76 of larger diameter than the cylinder is tted onto the front reduced portion thereof against the shoulder formed b the flange 72 and extends axially beyond t ie front face of the cylinder and 1S counter-bored from its front to an internal shoulder 77 flush with the end face of the cyl- -on the dowel pin 74, and on the internal shoulder 77 of the front shoe ring and hold all of these parts in position.

79 designates a rear removable shoerin also of larger diameter than the cylinder and fitted onto the rear reduced end thereof.

against the shoulder formed bythe flange 73 and also extendingaxially beyond the rear face of the cylinder. The rear head 24 is concentric with the cylinder and is providedwith a seat fitting inside of the axial extension of the rear shoering and bearing against the rear face of the cylinder,,being provided with an external flange 79 providing a shoulder bearing against the rear face ofthe rear shoe ring, thus holding the latter in place.

The operation is ,as follows: Air' under pressure enters from a hose or "the like into the rear opening 30 and thence through the longitudinal admission ort 32 to the inside of the cylinder behind tiieblade, thereby rotating the piston, and escapes through the exhaust ports 34 and 36. The absorbent coil 61 retards the flow ofthe oil and,distributes it over a considerable time, thereby preventing the-oil from quickly flowing into the bearings and being quickly blown away leaving the bearings dry. The front shoe ring 76 can be very readily removed and, replaced when worn by anew one, or replaced y one of larger size. 7 This permits the boiler to be rough cleaned with one tool, and then by replacing the shoe ring with a slightly larger one thetubes can be finished with another suitable tool.

. The motor is com act, durable, simple and easily ins ected an repaired.

What I claim is:

1. A rotary motor com rising a cylinder, a piston therein, a bearing or said piston closing the front end of the cylinder, a head at the rear end of the cylinder, and headed bolts extending longitudinally through the cylinder into the rear head and having their heads overlying the front face of the bearing.

2. A rotary motor comprising a cylinder open at both ends and counterbored from the ends to form shoulders, a piston in said cylinder, bushings in the codnterbores and seating against the shoulders in the cylinder, a head fitting against the rear'end of the cylinder, and headed bolts extendin through the cylinder into the rear head am having their heads overlying the front face of the front bushing.

3. A rotary motor comprising a cylinder, a piston therein, a bushing fitting in the front end of the cylinder, a dowel fitting in alining grooves in the cylinder and bushing, a head'fitting against the rear end of the cylinder, and headed bolts extending longitudinally through the cylinder and into the rear head and having their heads overlying the front face of the bushing and the dowel.

.open at both ends, a piston in said cylinder,

bearings fitting in the ends of said cylinder, dowels or keys fitting in alining grooves in the cylinder and-said bearings, a head fittin against the rear end of the cylinder, and headed bolts extending longitudinally through the cylinder and into the rear head and having their headsoverlying. the front face of the front bearing and the dowel.

, 5. In a rotary motor a cylinder-having externally shouldered portions at its ends, shoe rings fitting said shouldered ortions, a head fitting one end of the cylin er and bearing against oneshoe ring, and headed boltsextending through the cylinder radially internal to said shoe rings and into said head and havin their heads overlapping a portion of the ot er shoe ring.

6. A rotary motor comprising a cylinder having its end shouldered exterlorly, a shoe ring fitting said end and counterbored internal v to;a shoulder, and headed screws extended into the cylinder radially internal to said shoerin and having the heads bearing againstsaid sdmulder of the shoe ring.

7. A rotary motor comprising a cylinder having its'end shouldered on the exterior, a shoe ring fitting said shouldered portion of the c linder and counterbored internally to a shoul d'er, headed screws extending into the cylinder and having the heads overlapping said shoulder of the shoe ring, said shoe ring being cut away on the interior to a radius greater than that of the heads of the screws.

r 8. A rotary motor comprising a cylinder, a piston therein (provided with a journal havmg an enlarge head on its rear end, a bushing forming a bearing for said journal and counterbored from its rear face to form chamber for the journal head, and a head secured a ainst the end of said cylinder and provided on its inner face with a radial vent groove communicating with said chamber.

9. A rotary motor comprising a cylinder, a

piston therein havin a reduced journal and an enlarged head at idle end of said journal, a bushing in said 0 linder forming a bearing for the journal an counterbored in front and rear faces to receive respectively the body of the piston and said journal head, said bushing aving in addition to its journal bore a passage connecting its two end faces, and a ead at the end of the cylinder closing the rear counterbore of said bushing and prow vided on its inner face with a radial vent groove communicating with the rear conn-- terbore of the bushing.

10. A rotary motor comprising a cylinder,

a piston therein, a bearing in the front end of said cylinder having a cross port, a head fitted to the rear end of the cylinder and provided with an oil reservoir, and a screw extending longitudinally through the cylinder and into the rear head and provided with a portion of reduced section communicating with the oil reservoir in said. head and with the cross port in the bearing.

11. A rotary motor comprising a cylinder, a piston therein, a front bearing for said piston provided with a cross port, a head fitted to the rear end of the cylinder and provided with an oil reservoir, and a screw extending longitudinally through the cylinder into said head and provided with an annular groove communicating with said cross port, another annular groove communicating with the oil reservoir and a reduced section connecting said annular grooves.

12. In a rotary motor, an oil reservoir, a

assage leading from the same to a piston caring, a bobbin in said passage coin rising a reduced central portion and per orated disks, and a coil of absorbent material between said disks.

13. A rotary motor comprising an externally cylindrical casing having an eccentric bore with a counterbore from the end thereof to an internal shoulder, an eccentric bushing seated in said counterbore against said shoulder, and a rotary piston journaled in said bushing and contacting along a line with the bore of the casing. v

14. A rotary motor com rising a casing having a cylindrical externa form and a cylindrical internal seat eccentric to said ex ternal form, an eccentric bushing fitted in said seat, a rotary piston journaled in said bushing, headed screws sup )orted in said casing radially external to saicf bushing, and having heads overlying and engaging the end face of said bushing. I

15. A rotary motor comprising a cylindrical casin having an eccentric cylindrical end bore and a port or passage ext-ending longitudinally from an end face of said casing axially past and radially outside of saidend bore and communicating with the interior of said casing, a bushing seated in said end bore, and a rotary piston journaled in said bushing and contacting along a line with the internal wall of said casing.

16. A rotary motor comprising a cylindrical casing having an eccentric bore and an eccentric end counterbore forming an internal shoulder, a bushing seated in said counterbore against said shoulder and having a cylindrical pocket or counterbore init-s outer face, a rotary piston journaled in said bushing and having an enlarged end collar in said ocket or counterbore and forming a thrust earin with theend wall thereof, and a head secured to the end of saidcasing and closing the open end of said pocket in said bushing. 17. In a rotar motor; a cylindrical casing,

a bushing seate in the end of said casing, a rotary shaft journaled in said bushing and extending the greater part of the distance therethrough, and a head detachably secured to said casing closing the end of said bushing,

v a balance port or passage communicating between the. space behind the end of said shaft within said bushing and the interior of said casing.

18. A rotary motor comprising a cylindrical casing having an eccentric bore, a front and a rear end bushing seated in said eccentric bore, 'a rotary piston journaled in said bushings concentric with said casing, a rear end head bearing simultaneously on the rear face of said casing and on the rear face of the rear bushing, long screws passing through said casing and having engagement with said head and having heads overlying and bearing upon said front bushing to hold together and in place said casing, end head and bushings.

19. A rotary motor com rising a cylinder, at bushing seated in the ont end of said cylinder, a ported head bearing on the rear face of said cylinder, and long screws passing through said cylinder into said head at a radius beyond the outer surface of said bushing and furnished with enlarged heads overlying and bearing upon the front face of said bushing to hold it in place.

20. A rotary motor comprising a rotary slotted piston, a flatblade free to slide in the slot of said piston, a cylinder having an exhaust port and an admission port and having a bore contacting with said piston between.

said admission and exhaust ports, a bushing rotatably supporting said piston, and a head detachably secured to said cylinder and closing the end of said bushing and forming therewith a chamber at the end of said piston, said bushing being formed with a port or passage communicating from said chamber to the interior of the cylinder axially opposite the exhaust port.

21. A rotary motor comprising a rotary piston having a body portion with a longitudinal slot extending near to each end thereof and having a reduced journal portion and an enlarged end thrust collar, and a bushing externally eccentric to said )iston and mounting said journal portion thereof and counterbored from one face to receive the end of said body portion to said slot, and counterbored from the other face to receive said thrust collar forming a thrust bearing and engaging said ring and said bushing to t6 Pass oil along it from said .pocket to an oil 10 hold both axially in p ace. I passage in the front end of said cy1inder..

I 24. A rotary motor comprising a cylinder In testimony whereof, I the said PHILIP J.

' with a hole from-endto end thereof,-a rear DARLI GTON have hereunto setmy hand;

head furnished with an oil poket "Communicati'n with said hole, a screw seated in-said PHILIP hole 'aving engagement with saidcylinder Witn'esses; j and, with said rear head'to hold them to- 1 JOHN (VQORHEES,

gether, said screw being reduced in section HATTIE CLEAVES. 

